China SK-680U 680Ton Two-Platen Injection Molding Machine - Suppliers & Factory Direct Products
Product Introduction
The Entry-Level Powerhouse: Precision and Efficiency for Mid-Sized Manufacturing
The SUCCESSOR SK-680U represents the gateway to high-performance injection molding, redefining the standard for entry-level machines. Engineered as a high-performance model within the SK-U series, it is purpose-built to deliver exceptional efficiency and precision, making it the ideal foundation for mid-sized manufacturing operations seeking to elevate their production capabilities. At the heart of its design is a high-rigidity clamping unit, integrated with L-shaped precision guidance rails on a robust, engineered frame. This structural integrity guarantees an impressive movement accuracy of ±0.05mm, ensuring rapid and stable platen operation that maintains its precision even during the most demanding, long-duration production runs.
A key feature that protects your investment is the shock-free synchronous braking system, equipped with a sophisticated buffered mechanism. This technology enables zero-impact clamping, eliminating the stress and shock that can damage both expensive molds and delicate components, thereby extending equipment life and ensuring consistent part quality. The machine's adaptability is further enhanced by the independent high-pressure cylinder, which facilitates a controlled, slow high-pressure opening and allows for effortless tie-bar extraction. This makes the SK-680U an exceptional choice for workshops and facilities with low-headroom constraints. The machine's core reliability is reinforced by specially treated, uniform-stress guide posts that achieve over 99% force uniformity, effectively preventing eccentric loading and dramatically extending the service life of the entire unit. With a reinforced platen for superior mold-closing stability and an extended stroke designed to accommodate deep-cavity molds, it offers a significant cost advantage over traditional three-plate machines. The streamlined design simplifies routine maintenance, while its automated computer-controlled setup allows for fast, accurate, and intuitive mold adjustments. Perfect for automotive accessories, large household appliance parts, and medium-sized packaging, the SK-680U integrates high-response dual proportional valves for unparalleled operational control, striking the perfect balance between productivity, precision, and cost-effectiveness for growing manufacturing operations.
Core Engineering Highlights
Shock-Free Synchronous Braking
A buffered mechanism ensures rapid, reliable clamping with zero impact.
Independent High-Pressure Cylinder
Facilitates controlled, slow high-pressure opening and enables easy tie-bar extraction for low-headroom facilities.
High-Rigidity Precision Guidance
An L-shaped rail on a robust frame guarantee ±0.05mm accuracy, ensuring rapid and stable platen movement.
Durable Guide Posts with Uniform Stress
Specially treated for rigidity and wear/corrosion resistance, these posts achieve over 99% force uniformity to prevent eccentric loading and maximize service life.
Exceptional Precision in Mold Opening
Achieves a repeatable mold opening accuracy of ±0.2mm—a fivefold improvement over standard three-plate machines.
Ultra-Sensitive Mold Protection
Intelligent deceleration control provides high sensitivity, achieving the "A4 paper rebound" standard.
High-Speed Performance
Experience significantly faster dry cycles. Optimized system delivers rapid mold opening and clamping.
Partial Product
Machine Specifications
| MODEL | SK-680U | ||||
|---|---|---|---|---|---|
| Description | Item | Unit | A | B | C |
| INJECTION UNIT | Screw Diameter | MM | 85 | 90 | 95 |
| Screw L/D Ratio | L/D | 22.3 | 19.7 | 18.6 | |
| Shot Size (Theoretical) | CM³ | 2327 | 2609 | 2907 | |
| Injection Weight (PS) | G | 2118 | 2374 | 2645 | |
| Injection Rate | G/S | 543 | 608 | 678 | |
| Plasticizing Capacity | G/S | 63 | 74 | 88 | |
| Injection Pressure | MPA | 163 | 146 | 131 | |
| Screw Speed | RPM | 0 - 150 | |||
| CLAMPING UNIT | Clamp Tonnage | KN | 6800 | ||
| Space Between Tie Bars | MM | 960×900 | |||
| Opening Stroke | MM | 1800/1200 | |||
| Max. Mold Height | MM | 1000 | |||
| Min. Mold Height | MM | 400 | |||
| Max.daylight | MM | 2200 | |||
| Ejector Stroke | MM | 300 | |||
| Ejector Tonnage | KN | 150 | |||
| Ejector Number | PCS | 17 | |||
| OTHERS | Max. Pump Pressure | MPA | 17.5/21 | ||
| Pump Motor Power | KW | 31+42+13 | |||
| Heater Power | KW | 34.8 | |||
| Machine Dimension (LxWxH) | M | 8.6×2.6×2.5 | |||
| Machine Weight | T | 25 | |||
| Oil Tank Capacity | L | 950 | |||
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